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Impeller with protection elements and centrifugal compressor

a technology of protection elements and filters, applied in the field of filters, can solve the problems of high cost of filtering and separators, high maintenance cost, and poor mechanical properties of materials that are very good at resisting erosion

Active Publication Date: 2021-11-02
NUOVO PIGNONE TECH SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This solution effectively reduces liquid droplet erosion in centrifugal compressors, allowing for the use of different materials for the impeller body and protection elements, extending the impeller's lifetime and reducing the need for filters and separators.

Problems solved by technology

Filters and separators are costly and bulky and require maintenance.
Materials that are very good in resisting to erosion are often not very good in terms of mechanical properties; therefore, the material of the impeller is selected as a compromise between erosion resistance of its surfaces and mechanical resistance of its body.

Method used

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  • Impeller with protection elements and centrifugal compressor
  • Impeller with protection elements and centrifugal compressor
  • Impeller with protection elements and centrifugal compressor

Examples

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Embodiment Construction

[0030]The following description of exemplary embodiments refers to the accompanying drawings.

[0031]The following description does not limit embodiments of the present invention. Instead, the scope of the invention is defined by the appended claims.

[0032]Reference throughout the specification to “one embodiment” or “an embodiment” means that a particular feature, structure, or characteristic described in connection with an embodiment is included in at least one embodiment of the subject matter disclosed. Thus, the appearance of the phrases “in one embodiment” or “in an embodiment” in various places throughout the specification is not necessarily referring to the same embodiment. Further, the particular features, structures or characteristics may be combined in any suitable manner in one or more embodiments.

[0033]The impeller of FIG. 1 (see also FIG. 2) is a closed-type centrifugal impeller and has a main body with a root 1, a shroud 2 and a plurality of blades 3; the blades 3 connect...

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Abstract

The impeller includes a main body with a root, a shroud and a plurality of blades connecting the root and the shroud. Protection elements are associated to the blades and constitute at least the front part of the blades. The protection elements may consist of separate bodies or may be grouped together to form one or more protection bodies. In an embodiment, the material of the protection elements is different from the material of the main body, and may be, for example, a cobalt base alloy having a chromium content greater than 20% or nickel base alloy having a chromium content greater than 12%.

Description

TECHNICAL FIELD[0001]Embodiments of the subject matter disclosed herein generally relate to impellers with protection elements and methods for protecting an impeller, as well as centrifugal compressors and machines.[0002]These components and systems have been conceived and are particularly useful in the field of “Oil & Gas” as they are protected from e.g. liquid droplets erosion.BACKGROUND[0003]As it is known, impellers are subject to erosion; in some cases or some operating conditions, erosion is due for example to solid particles (such as sand grains) being at the inlet of the impeller and hitting against the surfaces of the impeller; in other cases or other operating conditions, erosion is due for example to liquid droplets being at the inlet of the impeller and hitting against the surfaces of the impeller; of course, other types of erosion exist.[0004]A first way to reduce erosion is by means of filters and / or separators connected to the inlet of the impeller upstream thereof.[0...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F04D29/28F04D29/02B22F5/10B22F3/15B23P15/00B22F10/20F04D29/30
CPCF04D29/289F04D29/023F04D29/284B22F3/15B22F5/10B22F10/20B23P15/006F04D29/30F05D2230/22F05D2230/23F05D2230/31F05D2230/42F05D2240/303F05D2300/10Y02P10/25F04D29/02
Inventor BELLACI, MICHELANGELOMASSINI, ANDREAGIANNOZZI, MASSIMOGIOVANNETTI, IACOPO
Owner NUOVO PIGNONE TECH SRL